Boels is one of the most expensive and cheekiest rental companies for us. I avoid it when possible but am also lucky to have 2 competitors nearby + hardware stores that also rent out a lot.
Good morning everyone, maybe it is interesting for some of you. I removed the adhesive using an angle grinder and grinding cup. It was a bit of work, but it worked well and cost only a fraction of the rental.
If you don't necessarily need those few millimeters, I would level the surface and then lay the new tiles or parquet on top. Saves time, money, nerves, and protects your health.